Cita APA (7th ed.)

Petri, J. L. (1988). Apple culture in the tropics and subtropics. ISHS.

Cita Chicago (17th ed.)

Petri, José Luis. Apple Culture in the Tropics and Subtropics. Wageningen: ISHS, 1988.

Cita MLA (9th ed.)

Petri, José Luis. Apple Culture in the Tropics and Subtropics. ISHS, 1988.