APA (7th ed.) Citation

Pieper, J., & Raskop, H. (1955). Christianismo. Ed. Aster [u.a.].

Chicago Style (17th ed.) Citation

Pieper, Josef, and Heinrich Raskop. Christianismo. Lisboa: Ed. Aster [u.a.], 1955.

MLA (9th ed.) Citation

Pieper, Josef, and Heinrich Raskop. Christianismo. Ed. Aster [u.a.], 1955.