APA

Sallis J. F., McKenzie T. L., Conway T. L., Elder J. P., Prochaska J. J., Brown M., Zive M. M., Marshall S. J. & Alcaraz J. E. (20030729). Environmental interventions for eating and physical activity: a randomized controlled trial in middle schools. : American journal of preventive medicine.

Chicago

Sallis James F, McKenzie Thomas L, Conway Terry L, Elder John P, Prochaska Judith J, Brown Marianne, Zive Michelle M, Marshall Simon J and Alcaraz John E. 20030729. Environmental interventions for eating and physical activity: a randomized controlled trial in middle schools. : American journal of preventive medicine.

Harvard

Sallis J. F., McKenzie T. L., Conway T. L., Elder J. P., Prochaska J. J., Brown M., Zive M. M., Marshall S. J. and Alcaraz J. E. (20030729). Environmental interventions for eating and physical activity: a randomized controlled trial in middle schools. : American journal of preventive medicine.

MLA

Sallis James F, McKenzie Thomas L, Conway Terry L, Elder John P, Prochaska Judith J, Brown Marianne, Zive Michelle M, Marshall Simon J and Alcaraz John E. Environmental interventions for eating and physical activity: a randomized controlled trial in middle schools. : American journal of preventive medicine. 20030729.