APA

Smith H. M., Taylor E. H., . (1948). An annotated checklist and key to the amphibia of Mexico. Washington: U.S. Govt. Print Off.

Chicago

Smith Hobart Muir, Taylor Edward Harrison, . 1948. An annotated checklist and key to the amphibia of Mexico. Washington: U.S. Govt. Print Off.

Harvard

Smith H. M., Taylor E. H., . (1948). An annotated checklist and key to the amphibia of Mexico. Washington: U.S. Govt. Print Off.

MLA

Smith Hobart Muir, Taylor Edward Harrison, . An annotated checklist and key to the amphibia of Mexico. Washington: U.S. Govt. Print Off. 1948.