Παραπομπή σε μορφή APA (7η εκδ.)

Knudsen, J. W. (1966). Biological techniques: Collecting, preserving and illustrating plants and animals. Harper & Row John Weatherhill, Inc.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Knudsen, Jens W. Biological Techniques: Collecting, Preserving and Illustrating Plants and Animals. New York Tokyo: Harper & Row John Weatherhill, Inc, 1966.

Παραπομπή σε μορφή MLA (8th εκδ.)

Knudsen, Jens W. Biological Techniques: Collecting, Preserving and Illustrating Plants and Animals. Harper & Row John Weatherhill, Inc, 1966.