APA (7th ed.) Citation

Hartman, H. M. (1959). Learn biology the easy way, the Cambridge library volume II. Greystone Press.

Chicago Style (17th ed.) Citation

Hartman, Harold M. Learn Biology the Easy Way, the Cambridge Library Volume II. Greystone Press, 1959.

MLA (8th ed.) Citation

Hartman, Harold M. Learn Biology the Easy Way, the Cambridge Library Volume II. Greystone Press, 1959.

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