APA

United States, National Association of State Directors of Teacher Education and Certification, . (1952). Proposed minimum standards for state approval of teacher preparing institutions. [Washington: .

Chicago

United States, National Association of State Directors of Teacher Education and Certification, . 1952. Proposed minimum standards for state approval of teacher preparing institutions. [Washington: .

Harvard

United States, National Association of State Directors of Teacher Education and Certification, . (1952). Proposed minimum standards for state approval of teacher preparing institutions. [Washington: .

MLA

United States, National Association of State Directors of Teacher Education and Certification, . Proposed minimum standards for state approval of teacher preparing institutions. [Washington: . 1952.