Mitchell, P. M. (1978). Vilhelm Gronbech. Twayne.
Cita Chicago (17th ed.)Mitchell, Phillip Marshall. Vilhelm Gronbech. Twayne, 1978.
Cita MLA (9th ed.)Mitchell, Phillip Marshall. Vilhelm Gronbech. Twayne, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.