APA (7th ed.) Citation

Ramus, P. (1569). Geometriae septem et viginti. Arithmetica, 1, .

Chicago Style (17th ed.) Citation

Ramus, Petrus. "Geometriae Septem Et Viginti." Arithmetica 1 (1569).

MLA (9th ed.) Citation

Ramus, Petrus. "Geometriae Septem Et Viginti." Arithmetica, 1, 1569.

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