APA (7th ed.) Citation

Siwek, P. (1948). Psychologia metaphysica. Pontificia Universitas Gregoriana.

Chicago Style (17th ed.) Citation

Siwek, Paul. Psychologia Metaphysica. Romae: Pontificia Universitas Gregoriana, 1948.

MLA (9th ed.) Citation

Siwek, Paul. Psychologia Metaphysica. Pontificia Universitas Gregoriana, 1948.

Warning: These citations may not always be 100% accurate.