Dyfyniad APA

Schenck, H. H. (1975). The world's submarine telephone cable systems. U.S. Dept. of Commerce, Office of Telecommunications.

Dyfyniad Arddull Chicago

Schenck, H. H. The World's Submarine Telephone Cable Systems. [Washington]: U.S. Dept. of Commerce, Office of Telecommunications, 1975.

Dyfyniad MLA

Schenck, H. H. The World's Submarine Telephone Cable Systems. U.S. Dept. of Commerce, Office of Telecommunications, 1975.

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