APA (7th ed.) Citation

Purkis, H., & Lipp, O. (2009). Are snakes and spiders special? Acquisition of negative valence and modified attentional processing by non-fear-relevant animal stimuli.

Chicago Style (17th ed.) Citation

Purkis, H., and Ottmar Lipp. Are Snakes and Spiders Special? Acquisition of Negative Valence and Modified Attentional Processing by Non-fear-relevant Animal Stimuli. 2009.

MLA (9th ed.) Citation

Purkis, H., and Ottmar Lipp. Are Snakes and Spiders Special? Acquisition of Negative Valence and Modified Attentional Processing by Non-fear-relevant Animal Stimuli. 2009.

Warning: These citations may not always be 100% accurate.