APA (7th ed.) Zitazioa
Helvie, C. O. (1981). Community health nursing: Theory and Process. Harper & Row.
Chicago Style (17th ed.) Zitazioa
Helvie, Carl O. Community Health Nursing: Theory and Process. Philadelphia: Harper & Row, 1981.
MLA (9th ed.) Zitazioa
Helvie, Carl O. Community Health Nursing: Theory and Process. Harper & Row, 1981.
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