Cita APA (7th ed.)

Heinrich, G. (1967). Hugo Rachel, Johannes Papritz, Paul Wallich (Bd. 2-3: Hugo Rachel, Paul Wallich). de Gruyter.

Cita Chicago (17th ed.)

Heinrich, Gerd. Hugo Rachel, Johannes Papritz, Paul Wallich (Bd. 2-3: Hugo Rachel, Paul Wallich). Berlin: de Gruyter, 1967.

Cita MLA (8th ed.)

Heinrich, Gerd. Hugo Rachel, Johannes Papritz, Paul Wallich (Bd. 2-3: Hugo Rachel, Paul Wallich). de Gruyter, 1967.