APA

Conference on Pre-school Education, Conference on Pre-school Education & Conference on Pre-school Education. (1968). Early education; current theory, research, and action. Chicago: Aldine Pub. Co.

Chicago

Conference on Pre-school Education, Conference on Pre-school Education and Conference on Pre-school Education. 1968. Early education; current theory, research, and action. Chicago: Aldine Pub. Co.

Harvard

Conference on Pre-school Education, Conference on Pre-school Education and Conference on Pre-school Education. (1968). Early education; current theory, research, and action. Chicago: Aldine Pub. Co.

MLA

Conference on Pre-school Education, Conference on Pre-school Education and Conference on Pre-school Education. Early education; current theory, research, and action. Chicago: Aldine Pub. Co. 1968.