APA
Ramm B. L., . (1953). Types of apologetic systems, an introductory study to the Christian philosophy of religion. Wheaton, Ill: Van Kampen Press.
Chicago
Ramm Bernard L, . 1953. Types of apologetic systems, an introductory study to the Christian philosophy of religion. Wheaton, Ill: Van Kampen Press.
Harvard
Ramm B. L., . (1953). Types of apologetic systems, an introductory study to the Christian philosophy of religion. Wheaton, Ill: Van Kampen Press.
MLA
Ramm Bernard L, . Types of apologetic systems, an introductory study to the Christian philosophy of religion. Wheaton, Ill: Van Kampen Press. 1953.