APA

McCracken G. F., Hayes J. P., Cevallos J., Guffey S. Z. & Romero F. C. (1997). Observations on the distribution, ecology, and behaviour of bats on the Galapagos Islands. [S.d.]: [s.d.].

Chicago

McCracken G F, Hayes J P, Cevallos J, Guffey S Z and Romero F C. 1997. Observations on the distribution, ecology, and behaviour of bats on the Galapagos Islands. [S.d.]: [s.d.].

Harvard

McCracken G. F., Hayes J. P., Cevallos J., Guffey S. Z. and Romero F. C. (1997). Observations on the distribution, ecology, and behaviour of bats on the Galapagos Islands. [S.d.]: [s.d.].

MLA

McCracken G F, Hayes J P, Cevallos J, Guffey S Z and Romero F C. Observations on the distribution, ecology, and behaviour of bats on the Galapagos Islands. [S.d.]: [s.d.]. 1997.