APA

Sharkey N., Catholic University of America (Washington), . (1950). Saint Gregory the Great's concept of papal power. Washington (D.C.): Catholic University of America.

Chicago

Sharkey Neil, Catholic University of America (Washington), . 1950. Saint Gregory the Great's concept of papal power. Washington (D.C.): Catholic University of America.

Harvard

Sharkey N., Catholic University of America (Washington), . (1950). Saint Gregory the Great's concept of papal power. Washington (D.C.): Catholic University of America.

MLA

Sharkey Neil, Catholic University of America (Washington), . Saint Gregory the Great's concept of papal power. Washington (D.C.): Catholic University of America. 1950.