APA

Williston Samuel,, . (2001). A treatise on the law of contracts Vol. I : Forms. New York: West Group.

Chicago

Williston Samuel,, . 2001. A treatise on the law of contracts Vol. I : Forms. New York: West Group.

Harvard

Williston Samuel,, . (2001). A treatise on the law of contracts Vol. I : Forms. New York: West Group.

MLA

Williston Samuel,, . A treatise on the law of contracts Vol. I : Forms. New York: West Group. 2001.