APA (7th ed.) Citation

Gruber, E., & Jędra, A. (2000). Tajny świat parapsychologii. "Amber".

Chicago Style (17th ed.) Citation

Gruber, Elmar, and Anna Jędra. Tajny świat Parapsychologii. Warszawa: "Amber", 2000.

MLA (9th ed.) Citation

Gruber, Elmar, and Anna Jędra. Tajny świat Parapsychologii. "Amber", 2000.

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