Cita APA (7a ed.)

Elman, R., & Amadon, D. (1977). First in the field: America's pioneering naturalists. Van Nostrand Reinhold Company.

Cita Chicago Style (17a ed.)

Elman, Robert, y Dean Amadon. First in the Field: America's Pioneering Naturalists. New York [i pozostałe]: Van Nostrand Reinhold Company, 1977.

Cita MLA (9a ed.)

Elman, Robert, y Dean Amadon. First in the Field: America's Pioneering Naturalists. Van Nostrand Reinhold Company, 1977.