Παραπομπή APA

Dobson, F. R., & Virgo, H. E. (1970). Canada and the United States. English Univ. Press.

Παραπομπή Chicago Style

Dobson, F. R., και H. E. Virgo. Canada and the United States. London: English Univ. Press, 1970.

Παραπομπή MLA

Dobson, F. R., και H. E. Virgo. Canada and the United States. English Univ. Press, 1970.