郝乐著. (2019). 统计·预测·评价方法与应用. 冶金工业出版社.
Lua i Stíl Chicago (17ú heag.)郝乐著. 统计·预测·评价方法与应用. 冶金工业出版社, 2019.
Lua MLA (8ú heag.)郝乐著. 统计·预测·评价方法与应用. 冶金工业出版社, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)