MLA

Rondelet, Guillaume, 1507-1566. Gulielmi Rondeletii ... Libri de piscibus marinis, in quibus veræ piscium effigies expressæ sunt .... 1554-55.. https://collections.library.yale.edu/catalog/32185238.

APA, 6th edition

Rondelet, Guillaume, 1507-1566. (1554-55.)[Gulielmi Rondeletii ... Libri de piscibus marinis, in quibus veræ piscium effigies expressæ sunt ...]. https://collections.library.yale.edu/catalog/32185238.