Crockett, J. U. (1978). Plantes a feuilles persistantes. Time-Life.
Cita Chicago (17th ed.)Crockett, JAmes Underwood. Plantes a Feuilles Persistantes. Time-Life, 1978.
Cita MLA (9th ed.)Crockett, JAmes Underwood. Plantes a Feuilles Persistantes. Time-Life, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.