(1955). Wat is P.B.O.? 's-Gravenhage.
Chicago Style (17th ed.) CitationWat Is P.B.O.? 's-Gravenhage, 1955.
MLA (8th ed.) CitationWat Is P.B.O.? 's-Gravenhage, 1955.
Warning: These citations may not always be 100% accurate.
APA (7th ed.) Citation