Chorley, R. J., & Haggett , P. (1970). Frontiers in geographical teaching.
Chicago Edition CitationChorley, Richard J., i Peter Haggett. Frontiers in Geographical Teaching. 1970.
Cita MLAChorley, Richard J., i Peter Haggett. Frontiers in Geographical Teaching. 1970.
Atenció: Aquestes cites poden no estar 100% correctes.