Gaya APA

Kepner, R., E.L, I, B, R, I, B. (NULL). Principles farm machinery . Connecticut:: Connecticut: Avi Publishing; 1978.

Gaya MLA

Kepner, R.A., E.L, I., Bainer,, Roy, II., Barger,. "Principles farm machinery". Connecticut:: Connecticut: Avi Publishing; 1978, NULL. Text.