Cita APA (7th ed.)
Heusser, C. J. (1971). Pollen and spores of chile. University of Arizona.
Cita Chicago (17th ed.)
Heusser, Calvin J. Pollen and Spores of Chile. Tucson, EUA: University of Arizona, 1971.
Cita MLA (9th ed.)
Heusser, Calvin J. Pollen and Spores of Chile. University of Arizona, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.