APA

Massey C., . (1903). In the struggle of life. Leipzig: Verlag Spindler Paul.

Chicago

Massey C, . 1903. In the struggle of life. Leipzig: Verlag Spindler Paul.

Harvard

Massey C., . (1903). In the struggle of life. Leipzig: Verlag Spindler Paul.

MLA

Massey C, . In the struggle of life. Leipzig: Verlag Spindler Paul. 1903.