APA (7 वां संस्करण) प्रशस्ति पत्र

Crutchfield, N., & Roughton, J. (2014). Safety culture: An innovative leadership approach. Butterworth-Heinemann.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Crutchfield, Nathan, और James Roughton. Safety Culture: An Innovative Leadership Approach. Oxford, England ; Waltham, Mass.: Butterworth-Heinemann, 2014.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Crutchfield, Nathan, और James Roughton. Safety Culture: An Innovative Leadership Approach. Butterworth-Heinemann, 2014.