Cita APA (7th ed.)

Bittner, R. H. (1974). Agricultural machinery safety. John Deere.

Cita Chicago (17th ed.)

Bittner, Richard H. Agricultural Machinery Safety. Moline: John Deere, 1974.

Cita MLA (9th ed.)

Bittner, Richard H. Agricultural Machinery Safety. John Deere, 1974.