APA

Karpf D. B., Shapiro D. R., Seeman E., Ensrud K. E., Johnston C. C., Adami S., Harris S. T., Santora A. C., Hirsch L. J., Oppenheimer L. & Thompson D. (19970417). Prevention of nonvertebral fractures by alendronate. A meta-analysis. Alendronate Osteoporosis Treatment Study Groups. : JAMA.

Chicago

Karpf D B, Shapiro D R, Seeman E, Ensrud K E, Johnston C C, Adami S, Harris S T, Santora A C, Hirsch L J, Oppenheimer L and Thompson D. 19970417. Prevention of nonvertebral fractures by alendronate. A meta-analysis. Alendronate Osteoporosis Treatment Study Groups. : JAMA.

Harvard

Karpf D. B., Shapiro D. R., Seeman E., Ensrud K. E., Johnston C. C., Adami S., Harris S. T., Santora A. C., Hirsch L. J., Oppenheimer L. and Thompson D. (19970417). Prevention of nonvertebral fractures by alendronate. A meta-analysis. Alendronate Osteoporosis Treatment Study Groups. : JAMA.

MLA

Karpf D B, Shapiro D R, Seeman E, Ensrud K E, Johnston C C, Adami S, Harris S T, Santora A C, Hirsch L J, Oppenheimer L and Thompson D. Prevention of nonvertebral fractures by alendronate. A meta-analysis. Alendronate Osteoporosis Treatment Study Groups. : JAMA. 19970417.