APA ציטוט

National Education Association of the United States. Dept. of Elementary School Principals. (1948). The principal and audio-visual education. s.n.

Chicago Style (17th ed.) Citation

National Education Association of the United States. Dept. of Elementary School Principals. The Principal and Audio-visual Education. Washington: s.n, 1948.

ציטוט MLA

National Education Association of the United States. Dept. of Elementary School Principals. The Principal and Audio-visual Education. s.n, 1948.