APA (7th ed.) Citation

Hardt, J., Metzendorf, M., & Meerpohl, J. J. (2013). Surgical trials and trial registers: A cross-sectional study of randomized controlled trials published in journals requiring trial registration in the author instructions. Trials, 14, .

Chicago Style (17th ed.) Citation

Hardt, Julia, Maria-Inti Metzendorf, and Jörg J. Meerpohl. "Surgical Trials and Trial Registers: A Cross-sectional Study of Randomized Controlled Trials Published in Journals Requiring Trial Registration in the Author Instructions." Trials 14 (2013).

MLA (9th ed.) Citation

Hardt, Julia, et al. "Surgical Trials and Trial Registers: A Cross-sectional Study of Randomized Controlled Trials Published in Journals Requiring Trial Registration in the Author Instructions." Trials, vol. 14, 2013.