APA

Langley M., . (2013). Memo, Bd. 72. : .

Chicago

Langley Myrtle, . 2013. Memo, Bd. 72. : .

Harvard

Langley M., . (2013). Memo, Bd. 72. : .

MLA

Langley Myrtle, . Memo, Bd. 72. : . 2013.