Παραπομπή APA

Scagel, R. (1969). Plant diversity: An evolutionary approch. Wadsworth Publishers.

Παραπομπή Chicago Style

Scagel, R.F. Plant Diversity: An Evolutionary Approch. Belmount: Wadsworth Publishers, 1969.

Παραπομπή MLA

Scagel, R.F. Plant Diversity: An Evolutionary Approch. Wadsworth Publishers, 1969.