Lua APA (7ú heag.)

Keep, A. V. (1981). The Premenstrual Syndrome. MTP Press Limited.

Lua i Stíl Chicago (17ú heag.)

Keep, A. Van. The Premenstrual Syndrome. Berlin: MTP Press Limited, 1981.

Lua MLA (9ú heag.)

Keep, A. Van. The Premenstrual Syndrome. MTP Press Limited, 1981.

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