Παραπομπή APA

Chorley, R. J., & Haggett , P. (1970). Frontiers in geographical teaching.

Παραπομπή Chicago Style

Chorley, Richard J., και Peter Haggett. Frontiers in Geographical Teaching. 1970.

Παραπομπή MLA

Chorley, Richard J., και Peter Haggett. Frontiers in Geographical Teaching. 1970.