APA

Early Childhood Directors Association, . (1990). Policies and procedures. St. Paul: Early Childhood Directors Association.

Chicago

Early Childhood Directors Association, . 1990. Policies and procedures. St. Paul: Early Childhood Directors Association.

Harvard

Early Childhood Directors Association, . (1990). Policies and procedures. St. Paul: Early Childhood Directors Association.

MLA

Early Childhood Directors Association, . Policies and procedures. St. Paul: Early Childhood Directors Association. 1990.