APA

Institute of Social Studies, . (19611968). Publications of the Institute of Social Studies. 's-Gravenhage: Mouton.

Chicago

Institute of Social Studies, . 19611968. Publications of the Institute of Social Studies. 's-Gravenhage: Mouton.

Harvard

Institute of Social Studies, . (19611968). Publications of the Institute of Social Studies. 's-Gravenhage: Mouton.

MLA

Institute of Social Studies, . Publications of the Institute of Social Studies. 's-Gravenhage: Mouton. 19611968.