Gaya APA

Johnston, E, R., Beer, F, P. (1988). Vektor mechanics for engineers / Ferdinand P. Beer, E. Russell Johnston (Ed.ke-2, Cet.5). : McGraw-Hill.

Gaya MLA

Johnston, E., Russell., Beer, Ferdinand, P.. "Vektor mechanics for engineers / Ferdinand P. Beer, E. Russell Johnston". Ed.ke-2, Cet.5 : McGraw-Hill, 1988. Skripsi.