Robert Plutchik

• Emotions and Life
• Emotion, a psychoevolutionary synthesis
• Emotions profile index
• The emotions: facts, theories, and a new model
• Emotion
• Emotion: Theory, Research and Experience
• Emotion, psychopathology, and psychotherapy
• Circumplex models of personality and emotions
• Ego defenses
• Emotion
• Emotion, theory, research, and experience
• Foundations of experimental research