American Psychological Association 6th edition

Plünnecke, H. (n.d.). A number-theoretical application of graph theory. https://doi.org/10.1515/crll.1970.243.171

ISO-690 (author-date, English)

PLÜNNECKE, Helmut, [no date]. A number-theoretical application of graph theory. . DOI 10.1515/crll.1970.243.171.

Modern Language Association 9th edition

Plünnecke, H. A Number-Theoretical Application of Graph Theory. https://doi.org/10.1515/crll.1970.243.171.

Mohr Siebeck - Recht (Deutsch - Österreich)

Plünnecke, Helmut: A number-theoretical application of graph theory,

Emerald - Harvard

Plünnecke, H. (n.d.). “A number-theoretical application of graph theory”, available at:https://doi.org/10.1515/crll.1970.243.171.

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