Παραπομπή APA

Penfold, A. R., & Willis, J. L. (1961). Eucalypts: Botany, cultivation, chemistry & Utilization. Leonard Hill Books.

Παραπομπή Chicago Style

Penfold, A R., και J L. Willis. Eucalypts: Botany, Cultivation, Chemistry & Utilization. London: Leonard Hill Books, 1961.

Παραπομπή MLA

Penfold, A R., και J L. Willis. Eucalypts: Botany, Cultivation, Chemistry & Utilization. Leonard Hill Books, 1961.