Παραπομπή σε μορφή APA (7η εκδ.)

Wilke, R. J. (1993). Environmental education: Teacher resource handbook : a practical guide for K-12 environmental education. Corwin.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wilke, Richard J. Environmental Education: Teacher Resource Handbook : A Practical Guide for K-12 Environmental Education. Arlington: Corwin, 1993.

Παραπομπή σε μορφή MLA (8th εκδ.)

Wilke, Richard J. Environmental Education: Teacher Resource Handbook : A Practical Guide for K-12 Environmental Education. Corwin, 1993.