Kwak, N., & Garrett, W. A. (o. J.). Rich and poor in Saint Louis: Performance characteristics of public schools using a Data Envelopment Analysis approach [Electronic]. Financial Modeling Applications and Data Envelopment Applications, ((2009), Seite 227-246), , Seite 227-246. https://doi.org/10.1108/S0276-8976(2009)0000013014

KWAK, N.K. und GARRETT, Walter A., [no date]. Rich and poor in Saint Louis: Performance characteristics of public schools using a Data Envelopment Analysis approach. Financial Modeling Applications and Data Envelopment Applications. No. (2009), Seite 227-246, p. , Seite 227-246. DOI 10.1108/S0276-8976(2009)0000013014.

Kwak, N., und W. A. Garrett. „Rich and poor in Saint Louis: Performance characteristics of public schools using a Data Envelopment Analysis approach“. Financial Modeling Applications and Data Envelopment Applications, electronic, Nr. (2009), Seite 227-246, Emerald Group Publishing Limited [Erscheinungsort nicht ermittelbar] : Emerald Group Publishing Limited, S. , Seite 227-246, https://doi.org/10.1108/S0276-8976(2009)0000013014.

Kwak, N.K./Garrett, Walter A.: Rich and poor in Saint Louis: Performance characteristics of public schools using a Data Envelopment Analysis approach, Financial Modeling Applications and Data Envelopment Applications , Seite 227-246.

Kwak, N. und Garrett, W.A. (o. J.). „Rich and poor in Saint Louis: Performance characteristics of public schools using a Data Envelopment Analysis approach“, Financial Modeling Applications and Data Envelopment Applications, Emerald Group Publishing Limited [Erscheinungsort nicht ermittelbar] : Emerald Group Publishing Limited, Bingley, UK, No. (2009), Seite 227-246, S. , Seite 227-246.