Dyfyniad APA

Pearson, P., Lewis, S., Britton, J., & Fogarty, A. (2004). Vitamin E supplements in asthma: A parallel group randomised placebo controlled trial. BMJ Group.

Dyfyniad Arddull Chicago

Pearson, P., S. Lewis, J. Britton, and A. Fogarty. Vitamin E Supplements in Asthma: A Parallel Group Randomised Placebo Controlled Trial. BMJ Group, 2004.

Dyfyniad MLA

Pearson, P., S. Lewis, J. Britton, and A. Fogarty. Vitamin E Supplements in Asthma: A Parallel Group Randomised Placebo Controlled Trial. BMJ Group, 2004.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.