APA

Smith R., Smith J. I., Shen X., Engel P. J., Bowman M. E., McGrath S. A., Bisits A. M., McElduff P., Giles W. B. & Smith D. W. (20090702). Patterns of plasma corticotropin-releasing hormone, progesterone, estradiol, and estriol change and the onset of human labor. : The Journal of clinical endocrinology and metabolism.

Chicago

Smith Roger, Smith Julia I, Shen Xiaobin, Engel Patricia J, Bowman Maria E, McGrath Shaun A, Bisits Andrew M, McElduff Patrick, Giles Warwick B and Smith David W. 20090702. Patterns of plasma corticotropin-releasing hormone, progesterone, estradiol, and estriol change and the onset of human labor. : The Journal of clinical endocrinology and metabolism.

Harvard

Smith R., Smith J. I., Shen X., Engel P. J., Bowman M. E., McGrath S. A., Bisits A. M., McElduff P., Giles W. B. and Smith D. W. (20090702). Patterns of plasma corticotropin-releasing hormone, progesterone, estradiol, and estriol change and the onset of human labor. : The Journal of clinical endocrinology and metabolism.

MLA

Smith Roger, Smith Julia I, Shen Xiaobin, Engel Patricia J, Bowman Maria E, McGrath Shaun A, Bisits Andrew M, McElduff Patrick, Giles Warwick B and Smith David W. Patterns of plasma corticotropin-releasing hormone, progesterone, estradiol, and estriol change and the onset of human labor. : The Journal of clinical endocrinology and metabolism. 20090702.