APA (7th ed.) Citation

Walker, S. (2011). Some historical information about Zoo Associations - all over the World. Zoo's Print, 26(9), 25.

Chicago Style (17th ed.) Citation

Walker, Sally. "Some Historical Information About Zoo Associations - All over the World." Zoo's Print 26, no. 9 (2011): 25.

MLA (9th ed.) Citation

Walker, Sally. "Some Historical Information About Zoo Associations - All over the World." Zoo's Print, vol. 26, no. 9, 2011, p. 25.