APA (7th ed.) Citation

Crone, G. R. (1948). The Hereford world pap. Royal Geographical Society.

Chicago Style (17th ed.) Citation

Crone, G. R. The Hereford World Pap. London: Royal Geographical Society, 1948.

MLA (9th ed.) Citation

Crone, G. R. The Hereford World Pap. Royal Geographical Society, 1948.

Warning: These citations may not always be 100% accurate.