North Dakota. Department of Public Instruction. (1963). A course of study and a guide for teachers of eight grade earth science (prelim ed.). Department of Public Instruction.
Chicagoスタイル(17版)引用形式North Dakota. Department of Public Instruction. A Course of Study and a Guide for Teachers of Eight Grade Earth Science. prelim ed. Bismarck: Department of Public Instruction, 1963.
MLA(9版)引用形式North Dakota. Department of Public Instruction. A Course of Study and a Guide for Teachers of Eight Grade Earth Science. prelim ed. Department of Public Instruction, 1963.
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