APA (7th ed.) Citation

Wallis, J. E., Jr. (1928). German exports of power shovels and pile drivers, 1925-1927. [publisher not identified].

Chicago Style (17th ed.) Citation

Wallis, James E., Jr. German Exports of Power Shovels and Pile Drivers, 1925-1927. Washington, D.C.: [publisher not identified], 1928.

MLA (9th ed.) Citation

Wallis, James E., Jr. German Exports of Power Shovels and Pile Drivers, 1925-1927. [publisher not identified], 1928.

Warning: These citations may not always be 100% accurate.