Sheffield, C. (1980). Sight of Proteus: Science fiction. Sidgwick and Jackson.
Cita Chicago (17th ed.)Sheffield, Charles. Sight of Proteus: Science Fiction. London: Sidgwick and Jackson, 1980.
Cita MLA (8th ed.)Sheffield, Charles. Sight of Proteus: Science Fiction. Sidgwick and Jackson, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.