APA (7th ed.) Citation

Allen, C. S. (1988). Proposal for a lunar tunnel-boring machine. Dataplex Information Services.

Chicago Style (17th ed.) Citation

Allen, Christopher S. Proposal for a Lunar Tunnel-boring Machine. Houston, Tex.: Dataplex Information Services, 1988.

MLA (9th ed.) Citation

Allen, Christopher S. Proposal for a Lunar Tunnel-boring Machine. Dataplex Information Services, 1988.

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