| 其他書名 | Sources of "the System" in the Fifteenth Century Writings of the Infante D. Pedro of Portugal |
| 出版 | International Area Studies Programs, University of Massachusetts at Amherst, 1976 |
| URL | http://books.google.com.hk/books?id=LkC60AEACAAJ&hl=&source=gbs_api |