Cita APA (7th ed.)

Cartledge, I. V. (1978). A history of the coffee industry in Papua New Guinea. Papua New Guinea Marketing Board (Coffee Industry Board).

Cita Chicago (17th ed.)

Cartledge, Ian V. A History of the Coffee Industry in Papua New Guinea. [Boroko, P.N.G.]: Papua New Guinea Marketing Board (Coffee Industry Board), 1978.

Cita MLA (8th ed.)

Cartledge, Ian V. A History of the Coffee Industry in Papua New Guinea. Papua New Guinea Marketing Board (Coffee Industry Board), 1978.