Robertson, C. C. (1931). The cultivation of Mexican pines in the Union of South Africa: With notes on the species and their original habitat.
Chicago-Zitierstil (17. Ausg.)Robertson, Colin Charles. The Cultivation of Mexican Pines in the Union of South Africa: With Notes on the Species and Their Original Habitat. [London], 1931.
MLA-Zitierstil (9. Ausg.)Robertson, Colin Charles. The Cultivation of Mexican Pines in the Union of South Africa: With Notes on the Species and Their Original Habitat. 1931.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.