Cita APA (7a ed.)

Willwoll, A. (1952). Psychologia metaphysica (Editio altera.). Sumptibus Herder.

Cita Chicago Style (17a ed.)

Willwoll, Alexander. Psychologia Metaphysica. Editio altera. Friburgi [etc.]: Sumptibus Herder, 1952.

Cita MLA (9a ed.)

Willwoll, Alexander. Psychologia Metaphysica. Editio altera. Sumptibus Herder, 1952.