Hollandsche zaadhandel.

MLA

Zwaan, C. Hollandsche Zaadhandel. Mechelen: Hollandsche zaadhandel NV, 1930.

APA

Zwaan, C. (1930). Hollandsche zaadhandel. Mechelen: Hollandsche zaadhandel NV.

Chicago

Zwaan, C. Hollandsche Zaadhandel. Mechelen: Hollandsche zaadhandel NV, 1930.