APA

Nicol R., .The Irritable bowel stress book. London: Sheldon press.

Chicago

Nicol Rosemary, .The Irritable bowel stress book. London: Sheldon press.

Harvard

Nicol R., .The Irritable bowel stress book. London: Sheldon press.

MLA

Nicol Rosemary, .London: Sheldon press. .