Παραπομπή σε μορφή APA (7η εκδ.)

De Blij, H. J. (1995). The earth: An introduction to its physical and human geography (4th ed.). John Wiley and Sons.

Παραπομπή σε μορφή Chicago (17η εκδ.)

De Blij, Harm J. The Earth: An Introduction to Its Physical and Human Geography. 4th ed. New York: John Wiley and Sons, 1995.

Παραπομπή σε μορφή MLA (9th εκδ.)

De Blij, Harm J. The Earth: An Introduction to Its Physical and Human Geography. 4th ed. John Wiley and Sons, 1995.