Dyfyniad APA

Powers, D. L. (1987). Boundary value problems (3rd ed.). Harcourt Brace Jovanovich.

Dyfyniad Arddull Chicago

Powers, David L. Boundary Value Problems. 3rd ed. San Diego: Harcourt Brace Jovanovich, 1987.

Dyfyniad MLA

Powers, David L. Boundary Value Problems. 3rd ed. Harcourt Brace Jovanovich, 1987.

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