Παραπομπή APA

Lockey, B. (1964). Interpretation of ordinance survey maps and goegraphical picture (7th ed.). George Philip.

Παραπομπή Chicago Style

Lockey, B. Interpretation of Ordinance Survey Maps and Goegraphical Picture. 7th ed. London: George Philip, 1964.

Παραπομπή MLA

Lockey, B. Interpretation of Ordinance Survey Maps and Goegraphical Picture. 7th ed. George Philip, 1964.