Gaya APA

Gray, W, A., Gerrard, B, A. (1977). Learning By Doing: Developing Teaching Skills (Ed. 1). philippines: Addision-Wesley Publishing Company.

Gaya MLA

Gray, William, A., Gerrard, Brian, A.. "Learning By Doing: Developing Teaching Skills". Ed. 1 philippines: Addision-Wesley Publishing Company, 1977. Text.