Gaya APA

Welch, C, L, 1., Peter, G, M. (1988). Algebra for college students / Gilbert M. Peter, C. Lee Welch . Glenview, Illinois: Scott Foresman.

Gaya MLA

Welch, C., Lee,, 1928., Peter, Gilbert, M.. "Algebra for college students / Gilbert M. Peter, C. Lee Welch". Glenview, Illinois: Scott Foresman, 1988. Textbook.