APA

Shetler S. G., . (1973). An introduction to the botanical type specimen register. Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Chicago

Shetler Stanwyn G, . 1973. An introduction to the botanical type specimen register. Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Harvard

Shetler S. G., . (1973). An introduction to the botanical type specimen register. Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].

MLA

Shetler Stanwyn G, . An introduction to the botanical type specimen register. Washington: Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]. 1973.