Gaya APA

Wallen, J, R, F, N, E. (1990). How To Design and Evaluate Research In Education . usa: McGRAW-HILL,INC.

Gaya MLA

Wallen, Jack, R., Fraenkel,, Norman, E.. "How To Design and Evaluate Research In Education". usa: McGRAW-HILL,INC, 1990. Book.