APA ציטוט
Johnson, R. B., & Degraff, J. V. (1988). Principles of Engineering Geology. John Wiley & Sons.
Chicago Style (17th ed.) Citation
Johnson, Robert B., and Jerome V. Degraff. Principles of Engineering Geology. New Delhi: John Wiley & Sons, 1988.
ציטוט MLA
Johnson, Robert B., and Jerome V. Degraff. Principles of Engineering Geology. John Wiley & Sons, 1988.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.