Παραπομπή σε μορφή APA (7η εκδ.)

Thorpe, E. (2017). General studies paper 1: Geography and environmental ecology (volume 4). Pearson Education.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Thorpe, E. General Studies Paper 1: Geography and Environmental Ecology (volume 4). "Noida,": Pearson Education, 2017.

Παραπομπή σε μορφή MLA (9th εκδ.)

Thorpe, E. General Studies Paper 1: Geography and Environmental Ecology (volume 4). Pearson Education, 2017.