Gaya APA

Knowles, P, L., Sasali, R, A. (1981). Fluency Squares for Businessn and Technology . New Jersey: Prentice-Hall.

Gaya MLA

Knowles, Phillip, L.., Sasali, Ruth, A.. "Fluency Squares for Businessn and Technology". New Jersey: Prentice-Hall, 1981. Text.