MLA

Tachard, Guy, 1651-1712. A relation of the voyage to Siam. Performed by six Jesuits, sent by the French king, to the Indies and China, in the year, 1685 : With their astrological observations, and their remarks of natural philosophy, geography, hydrography, and history ... / Publ. 1688. https://collections.library.yale.edu/catalog/2057289.

APA, 6th edition

Tachard, Guy, 1651-1712. (1688)[A relation of the voyage to Siam. Performed by six Jesuits, sent by the French king, to the Indies and China, in the year, 1685 : With their astrological observations, and their remarks of natural philosophy, geography, hydrography, and history ... / Publ]. https://collections.library.yale.edu/catalog/2057289.