MLA

Lescuyer, Denys, bookseller, Postel, Guillaume, 1510-1581, Vidoue, Pierre, d. 1543, printer. Linguarum duodecim characteribus differentium alphabetum, introductio, ac legendi modus longe facilimus. : Linguarum nomina sequens proxime pagella offeret. / Guilielmi Postelli Barentonij diligentia. .... [1538]. https://collections.library.yale.edu/catalog/2077265.

APA, 6th edition

Lescuyer, Denys, bookseller, & Postel, Guillaume, 1510-1581, & Vidoue, Pierre, d. 1543, printer. ([1538])[Linguarum duodecim characteribus differentium alphabetum, introductio, ac legendi modus longe facilimus. : Linguarum nomina sequens proxime pagella offeret. / Guilielmi Postelli Barentonij diligentia. ...]. https://collections.library.yale.edu/catalog/2077265.