American Psychological Association 6th edition

Nikiforov, A. F., & Skachkov, M. V. (n.d.). Methods for computing Q-polynomials.

ISO-690 (author-date, English)

NIKIFOROV, A. F. and SKACHKOV, M. V., [no date]. Methods for computing Q-polynomials. .

Modern Language Association 9th edition

Nikiforov, A. F., and M. V. Skachkov. Methods for Computing Q-Polynomials.

Mohr Siebeck - Recht (Deutsch - Österreich)

Nikiforov, A. F./Skachkov, M. V.: Methods for computing Q-polynomials,

Emerald - Harvard

Nikiforov, A.F. and Skachkov, M.V. (n.d.). “Methods for computing Q-polynomials”.

Warning: These citations may not always be 100% accurate.