APA
(1991). Superconducting materials and magnets. [s.l.]: [s.n.].
Chicago
1991. Superconducting materials and magnets. [s.l.]: [s.n.].
Harvard
(1991). Superconducting materials and magnets. [s.l.]: [s.n.].
MLA
Superconducting materials and magnets. [s.l.]: [s.n.]. 1991.