Citação norma APA

Harper, H. A. (1978). Dr. Erhardt's letter was referred to Harold A. Harper, Phd, who replies as follows.

Citação norma Chicago

Harper, Harold A. Dr. Erhardt's Letter Was Referred to Harold A. Harper, Phd, Who Replies As Follows. 1978.

Citação norma MLA

Harper, Harold A. Dr. Erhardt's Letter Was Referred to Harold A. Harper, Phd, Who Replies As Follows. 1978.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.