(1970). Die Erde. Hermann Haack.
Cita Chicago (17th ed.)Die Erde. Gotha: Hermann Haack, 1970.
Cita MLA (8th ed.)Die Erde. Hermann Haack, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)
(1970). Die Erde. Hermann Haack.
Cita Chicago (17th ed.)Die Erde. Gotha: Hermann Haack, 1970.
Cita MLA (8th ed.)Die Erde. Hermann Haack, 1970.