RAILROAD TRACK, FRITZFASTENRATH [ed], & GRANT, W. [. (1981). Railroad track theory and practice. Frederick Ungar.
Cita Chicago (17th ed.)RAILROAD TRACK, FRITZFASTENRATH [ed], i Walter [pnj] GRANT. Railroad Track Theory and Practice. New York: Frederick Ungar, 1981.
Cita MLA (9th ed.)RAILROAD TRACK, et al. Railroad Track Theory and Practice. Frederick Ungar, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.