John-Roger & McWilliams, P. (1991). You can't afford the luxury of a negative thought: Book for people with any life-threatening illness including life. Ms. Rowan.
Παραπομπή σε μορφή Chicago (17η εκδ.)John-Roger και Peter McWilliams. You Can't Afford the Luxury of a Negative Thought: Book for People with Any Life-threatening Illness Including Life. Los Angeles: Ms. Rowan, 1991.
Παραπομπή σε μορφή MLA (9th εκδ.)John-Roger και Peter McWilliams. You Can't Afford the Luxury of a Negative Thought: Book for People with Any Life-threatening Illness Including Life. Ms. Rowan, 1991.
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