APA

Boylán E., . (1944). Difficulties in mental prayer. Dublin: M.H. Gill.

Chicago

Boylán Eugene, . 1944. Difficulties in mental prayer. Dublin: M.H. Gill.

Harvard

Boylán E., . (1944). Difficulties in mental prayer. Dublin: M.H. Gill.

MLA

Boylán Eugene, . Difficulties in mental prayer. Dublin: M.H. Gill. 1944.