Παραπομπή σε μορφή APA (7η εκδ.)

Robinson, A. G. (1899). The Porto Rico of to-day: Pen pictures of the people and the country. C. Scribner's sons.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Robinson, Albert Gardner. The Porto Rico of To-day: Pen Pictures of the People and the Country. New York: C. Scribner's sons, 1899.

Παραπομπή σε μορφή MLA (9th εκδ.)

Robinson, Albert Gardner. The Porto Rico of To-day: Pen Pictures of the People and the Country. C. Scribner's sons, 1899.