Colin, P. (1931). Opsomer, illustré de 32 reproductions en héliogravure. Paris: Editions G. Crès & Cie.
Chicago Style (17th ed.) CitationColin, Paul. Opsomer, Illustré De 32 Reproductions En Héliogravure. Paris: Editions G. Crès & Cie, 1931.
MLA (8th ed.) CitationColin, Paul. Opsomer, Illustré De 32 Reproductions En Héliogravure. Paris: Editions G. Crès & Cie, 1931.
Warning: These citations may not always be 100% accurate.