APA (7th ed.) Citation

Bernard, C., & Opsomer, I. (1947). Opsomer. De Sikkel.

Chicago Style (17th ed.) Citation

Bernard, Charles, and Isidore Opsomer. Opsomer. Anvers: De Sikkel, 1947.

MLA (9th ed.) Citation

Bernard, Charles, and Isidore Opsomer. Opsomer. De Sikkel, 1947.

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