Crevel, R., & Rattray, D. (1986). Difficult Death.
Chicago-Zitierstil (17. Ausg.)Crevel, René, und David Rattray. Difficult Death. San Francisco, 1986.
MLA-Zitierstil (8. Ausg.)Crevel, René, und David Rattray. Difficult Death. 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.