APA (7th ed.) Citation

Day, W. E. (1994). Characterization of the cervix in cycling mares using ultrasound. [publisher not identified].

Chicago Style (17th ed.) Citation

Day, William Edwin. Characterization of the Cervix in Cycling Mares Using Ultrasound. [Place of publication not identified]: [publisher not identified], 1994.

MLA (9th ed.) Citation

Day, William Edwin. Characterization of the Cervix in Cycling Mares Using Ultrasound. [publisher not identified], 1994.