APA

Bassler R. S., . (1934). Shelled invertebrates of the past and present: with chapters on geological history. New York: Smithsonian Institution Series.

Chicago

Bassler Ray S, . 1934. Shelled invertebrates of the past and present: with chapters on geological history. New York: Smithsonian Institution Series.

Harvard

Bassler R. S., . (1934). Shelled invertebrates of the past and present: with chapters on geological history. New York: Smithsonian Institution Series.

MLA

Bassler Ray S, . Shelled invertebrates of the past and present: with chapters on geological history. New York: Smithsonian Institution Series. 1934.