Ivany, J. W. G. (1975). Today's science: A professional approach to teaching elementary school science. Science Research Associates.
Цитирование в стиле Чикаго (17-е изд.)Ivany, J. W. George. Today's Science: A Professional Approach to Teaching Elementary School Science. Chicago: Science Research Associates, 1975.
Цитирование MLA (8-е изд.)Ivany, J. W. George. Today's Science: A Professional Approach to Teaching Elementary School Science. Science Research Associates, 1975.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.