APA
The subsidiary Committee on Seismology, . (1933). Physics of the earth. Washington: The National Academy of Sciences.
Chicago
The subsidiary Committee on Seismology, . 1933. Physics of the earth. Washington: The National Academy of Sciences.
Harvard
The subsidiary Committee on Seismology, . (1933). Physics of the earth. Washington: The National Academy of Sciences.
MLA
The subsidiary Committee on Seismology, . Physics of the earth. Washington: The National Academy of Sciences. 1933.