Tohutoro APA (7th ed.)
WESTON, C., & ET AL. (1996). OBSERVING FOR QUALITY. STATIONERY OFFICE.
Tohutoru Kātū Chicago (17th ed.)
WESTON, C., me ET AL. OBSERVING FOR QUALITY. Londres: STATIONERY OFFICE, 1996.
Tohutoro MLA (9th ed.)
WESTON, C., me ET AL. OBSERVING FOR QUALITY. STATIONERY OFFICE, 1996.
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