| 其他書名 | By George H. Copa, Jane Plihal, Marilyn A. Johnson |
| 出版 | Minnesota Research and Development Center for Vocational Education, Department of Vocational and Technical Education, University of Minnesota, 1986 |
| URL | http://books.google.com.hk/books?id=kLBMAQAAMAAJ&hl=&source=gbs_api |