(1986). Science and engineering dotorates: 1960 - 86. Washington: National Science Foundation.
Trích dẫn kiểu ChicagoScience and Engineering Dotorates: 1960 - 86. Washington: National Science Foundation, 1986.
ציטוט MLAScience and Engineering Dotorates: 1960 - 86. Washington: National Science Foundation, 1986.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.