Koh, C. (2007). Biology InsightsO Level Practical WorkbookCaroline Koh. Pearson Longman.
Lua i Stíl Chicago (17ú heag.)Koh, Caroline. Biology InsightsO Level Practical WorkbookCaroline Koh. Pearson Longman, 2007.
Lua MLA (8ú heag.)Koh, Caroline. Biology InsightsO Level Practical WorkbookCaroline Koh. Pearson Longman, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.