Gaya APA

Powel, D, J, S, &, R, E. (1961). Sheet Metal Pattern Drafting & Shop Problems Revised (-). United States of America: Chas. A. Bennett Co., Inc..

Gaya MLA

Powel, Dangherty, James,, S., &, Robert, E.. "Sheet Metal Pattern Drafting & Shop Problems Revised". - United States of America: Chas. A. Bennett Co., Inc., 1961. Text.