APA aipamena

Piper, D. W., Greig, M., Landecker, K. D., Shinners, J., Waller, S., & Canalese, J. (1977). Analgesic intake and chronic gastric ulcer. Acute upper gastrointestinal haemorrhage, personality traits and social class.

Chicago Style aipamena

Piper, D W., M. Greig, K D. Landecker, J. Shinners, S. Waller, and J. Canalese. Analgesic Intake and Chronic Gastric Ulcer. Acute Upper Gastrointestinal Haemorrhage, Personality Traits and Social Class. 1977.

MLA aipamena

Piper, D W., et al. Analgesic Intake and Chronic Gastric Ulcer. Acute Upper Gastrointestinal Haemorrhage, Personality Traits and Social Class. 1977.