APA (7th ed.) Citation

Gilson, P., Boeck, A. d., & Rickenbacher, K. A. (1994). Gilson, De Zee: De Boeck, Symphony in G. Discover International.

Chicago Style (17th ed.) Citation

Gilson, Paul, Auguste de Boeck, and Karl Anton Rickenbacher. Gilson, De Zee: De Boeck, Symphony in G. [Belgium?]: Discover International, 1994.

MLA (9th ed.) Citation

Gilson, Paul, et al. Gilson, De Zee: De Boeck, Symphony in G. Discover International, 1994.