Usherwood, T. (1989). INTERNATIONAL TRAVEL AND HEALTH: Vaccination requirements and health advice.
シカゴスタイル引用形Usherwood, Tim. INTERNATIONAL TRAVEL AND HEALTH: Vaccination Requirements and Health Advice. 1989.
MLA引用形式Usherwood, Tim. INTERNATIONAL TRAVEL AND HEALTH: Vaccination Requirements and Health Advice. 1989.
警告: この引用は必ずしも正確ではありません.