APA

Gamal Attia Abdelhamid Elsisy, Abdelrazek Mahmoud Aly Abdelrazek, Akeel Abdelshafy Salama & Mohamed Samy Sayed Abdou. (1997). Effect of season and contact with females on semen characteristics and testosterone hormone level in goats. Cairo: Gamal Attia Abdelhamid Elsisy.

Chicago

Gamal Attia Abdelhamid Elsisy, Abdelrazek Mahmoud Aly Abdelrazek, Akeel Abdelshafy Salama and Mohamed Samy Sayed Abdou. 1997. Effect of season and contact with females on semen characteristics and testosterone hormone level in goats. Cairo: Gamal Attia Abdelhamid Elsisy.

Harvard

Gamal Attia Abdelhamid Elsisy, Abdelrazek Mahmoud Aly Abdelrazek, Akeel Abdelshafy Salama and Mohamed Samy Sayed Abdou. (1997). Effect of season and contact with females on semen characteristics and testosterone hormone level in goats. Cairo: Gamal Attia Abdelhamid Elsisy.

MLA

Gamal Attia Abdelhamid Elsisy, Abdelrazek Mahmoud Aly Abdelrazek, Akeel Abdelshafy Salama and Mohamed Samy Sayed Abdou. Effect of season and contact with females on semen characteristics and testosterone hormone level in goats. Cairo: Gamal Attia Abdelhamid Elsisy. 1997.