National Learning Corporation. (2005). Sanitation worker: Test preparation study guide questions & answers. National Learning Corporation.
Style de citation Chicago (17e éd.)National Learning Corporation. Sanitation Worker: Test Preparation Study Guide Questions & Answers. Syosset, N.Y.: National Learning Corporation, 2005.
Style de citation MLA (8e éd.)National Learning Corporation. Sanitation Worker: Test Preparation Study Guide Questions & Answers. National Learning Corporation, 2005.
Attention : ces citations peuvent ne pas être correctes à 100%.