Books, Brochures, and Chapters>Book Chapter:  Allee, Warder Clyde Allee (1939), The Social Life of Insects, Chapter 7, Retrieved on 2011-09-03

Periodicals>Journal Article:  Cafaro, Philip , The Naturalist’s Virtues, Philosophy in the Contemporary World, Volume 8 Number 2 Fall-Winter 2001, Department of Philosophy, Colorado State Univ, Retrieved on 2011-06-10

Books, Brochures, and Chapters>Book:  Beebe, William (1988-04-01), The Book of Naturalists, Princeton University Press, Retrieved on 2011-06-10

Books, Brochures, and Chapters>Book:  Leopold , Aldo (2001-11-15), A Sand County Almanac (Outdoor Essays & Reflections), Oxford University Press, USA, Retrieved on 2011-06-10