APA (7th ed.) Citation

HARTMAN, H. (1960). Learn Biology the easy way. Greystone Press.

Chicago Style (17th ed.) Citation

HARTMAN, Harold. Learn Biology the Easy Way. Greystone Press, 1960.

MLA (8th ed.) Citation

HARTMAN, Harold. Learn Biology the Easy Way. Greystone Press, 1960.

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