Cita APA (7th ed.)
Bruun, E., & Keith, B. Heavy Equipment. Black Dog and Leventhal.
Cita Chicago (17th ed.)
Bruun, Erik, i Buzzy Keith. Heavy Equipment. Nueva York, EUA: Black Dog and Leventhal.
Cita MLA (9th ed.)
Bruun, Erik, i Buzzy Keith. Heavy Equipment. Black Dog and Leventhal.
Atenció: Aquestes cites poden no estar 100% correctes.