APA

Stevens K. B., Marr C. M., Horn J. N. R., Pfeiffer D. U., Perkins J. D., Bowen I. M., Allan E. J., Campbell J. & Elliott J. (20090317). Effect of left-sided valvular regurgitation on mortality and causes of death among a population of middle-aged and older horses. : The Veterinary record.

Chicago

Stevens K B, Marr C M, Horn J N R, Pfeiffer D U, Perkins J D, Bowen I M, Allan E J, Campbell J and Elliott J. 20090317. Effect of left-sided valvular regurgitation on mortality and causes of death among a population of middle-aged and older horses. : The Veterinary record.

Harvard

Stevens K. B., Marr C. M., Horn J. N. R., Pfeiffer D. U., Perkins J. D., Bowen I. M., Allan E. J., Campbell J. and Elliott J. (20090317). Effect of left-sided valvular regurgitation on mortality and causes of death among a population of middle-aged and older horses. : The Veterinary record.

MLA

Stevens K B, Marr C M, Horn J N R, Pfeiffer D U, Perkins J D, Bowen I M, Allan E J, Campbell J and Elliott J. Effect of left-sided valvular regurgitation on mortality and causes of death among a population of middle-aged and older horses. : The Veterinary record. 20090317.