APA (7th ed.) Citation

Petrequin, G. (1968). Individualizing learning through modular-flexible programming. McGraw-Hill.

Chicago Style (17th ed.) Citation

Petrequin, Gaynor. Individualizing Learning Through Modular-flexible Programming. New York u.a: McGraw-Hill, 1968.

MLA (9th ed.) Citation

Petrequin, Gaynor. Individualizing Learning Through Modular-flexible Programming. McGraw-Hill, 1968.