APA (7th ed.) Citation

Selkrik, K. (1991). Mathematics: Handbook. York Press.

Chicago Style (17th ed.) Citation

Selkrik, Keith. Mathematics: Handbook. York Press, 1991.

MLA (9th ed.) Citation

Selkrik, Keith. Mathematics: Handbook. York Press, 1991.

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