Cita APA (7th ed.)

Johns, R. J., & Stevens, P. (1971). Mount Wilhelm flora: A check list of the species. Division of Botany, Dept. of Forests.

Cita Chicago (17th ed.)

Johns, R. J., i P.F Stevens. Mount Wilhelm Flora: A Check List of the Species. New Guinea: Division of Botany, Dept. of Forests, 1971.

Cita MLA (8th ed.)

Johns, R. J., i P.F Stevens. Mount Wilhelm Flora: A Check List of the Species. Division of Botany, Dept. of Forests, 1971.