APA

Grou J. N., . (1955). Manual for interior souls. Westminster, Md: Newmann Press.

Chicago

Grou John Nicholas, . 1955. Manual for interior souls. Westminster, Md: Newmann Press.

Harvard

Grou J. N., . (1955). Manual for interior souls. Westminster, Md: Newmann Press.

MLA

Grou John Nicholas, . Manual for interior souls. Westminster, Md: Newmann Press. 1955.