York, U. o. t. S. o. N. (1969). The general science handbook; part 2. Bureau of Secondary Curriculum Development.
Cita Chicago (17th ed.)York, University of the State of New. The General Science Handbook; Part 2. New York: Bureau of Secondary Curriculum Development, 1969.
Cita MLA (9th ed.)York, University of the State of New. The General Science Handbook; Part 2. Bureau of Secondary Curriculum Development, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.