APA (7th ed.) Citation

Grefrath, P. Der Priesterverein "Unio Apostolica".

Chicago Style (17th ed.) Citation

Grefrath, Peter. Der Priesterverein "Unio Apostolica".

MLA (9th ed.) Citation

Grefrath, Peter. Der Priesterverein "Unio Apostolica".

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