APA (7th ed.) Citation

Boer, G. d. (1973). The two earliest maps of Hull.

Chicago Style (17th ed.) Citation

Boer, G. de. The Two Earliest Maps of Hull. 1973.

MLA (9th ed.) Citation

Boer, G. de. The Two Earliest Maps of Hull. 1973.

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