APA

Acton J., David, . (2011). Memo, Bd. 4. : .

Chicago

Acton Johnny, David, . 2011. Memo, Bd. 4. : .

Harvard

Acton J., David, . (2011). Memo, Bd. 4. : .

MLA

Acton Johnny, David, . Memo, Bd. 4. : . 2011.