Cita APA (7th ed.)

Ivany, J. W. G. (1975). Today's science: A professional approach to teaching elementary school science. Science Research Associates.

Cita Chicago (17th ed.)

Ivany, J. W. George. Today's Science: A Professional Approach to Teaching Elementary School Science. Chicago: Science Research Associates, 1975.

Cita MLA (8th ed.)

Ivany, J. W. George. Today's Science: A Professional Approach to Teaching Elementary School Science. Science Research Associates, 1975.