APA (7th ed.) Citation

Congress on the Integration of Science Teaching, Druzhba, Varna, Bulgaria, & Inter-Union Commission on Science Teaching. (1969). Congrès sur l'intégration des enseignements scientifiques: Congress on the Integration of Science Teaching. Droujba (Bulgarie), 11-19 septembre 1968. CIES.

Chicago Style (17th ed.) Citation

Congress on the Integration of Science Teaching, Druzhba, Varna, Bulgaria, and Inter-Union Commission on Science Teaching. Congrès Sur L'intégration Des Enseignements Scientifiques: Congress on the Integration of Science Teaching. Droujba (Bulgarie), 11-19 Septembre 1968. Paris: CIES, 1969.

MLA (8th ed.) Citation

Congress on the Integration of Science Teaching, Druzhba, Varna, Bulgaria, and Inter-Union Commission on Science Teaching. Congrès Sur L'intégration Des Enseignements Scientifiques: Congress on the Integration of Science Teaching. Droujba (Bulgarie), 11-19 Septembre 1968. CIES, 1969.