(1973). Integrated science worksheets (4th ed.). Heinemann Educational Books (Asia).
Chicagoスタイル(17版)引用形式Integrated Science Worksheets. 4th ed. Kuala Lumpur: Heinemann Educational Books (Asia), 1973.
MLA(9版)引用形式Integrated Science Worksheets. 4th ed. Heinemann Educational Books (Asia), 1973.
警告: この引用は必ずしも正確ではありません.