APA

Harkness G. E., . (1931). John Calvin: the man and his ethics. New York: H. Holt and company.

Chicago

Harkness Georgia Elma, . 1931. John Calvin: the man and his ethics. New York: H. Holt and company.

Harvard

Harkness G. E., . (1931). John Calvin: the man and his ethics. New York: H. Holt and company.

MLA

Harkness Georgia Elma, . John Calvin: the man and his ethics. New York: H. Holt and company. 1931.