Seefeldt, D. (1981). Stress was tun ? Verlag Tribüne.
Chicago Style (17. basım) AtıfSeefeldt, Dieter. Stress Was Tun ? Berlin: Verlag Tribüne, 1981.
MLA (8th ed.) AtıfSeefeldt, Dieter. Stress Was Tun ? Verlag Tribüne, 1981.
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