Παραπομπή σε μορφή APA (7η εκδ.)

Hoehn, R. G. (1995). Science puzzlers!: 150 ready-to-use activities to make learning fun : grades 4-8. Center for Applied Research in Education.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hoehn, Robert G. Science Puzzlers!: 150 Ready-to-use Activities to Make Learning Fun : Grades 4-8. West Nyack, N.Y: Center for Applied Research in Education, 1995.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hoehn, Robert G. Science Puzzlers!: 150 Ready-to-use Activities to Make Learning Fun : Grades 4-8. Center for Applied Research in Education, 1995.