APA
Gudas J. P., Joyce J. A., Hackett E. M. & National symposium on fracture mechanics. (1990). Fracture mechanics: twenty-first symposium. Philadelphia: ASTM.
Chicago
Gudas J P, Joyce J A, Hackett E M and National symposium on fracture mechanics. 1990. Fracture mechanics: twenty-first symposium. Philadelphia: ASTM.
Harvard
Gudas J. P., Joyce J. A., Hackett E. M. and National symposium on fracture mechanics. (1990). Fracture mechanics: twenty-first symposium. Philadelphia: ASTM.
MLA
Gudas J P, Joyce J A, Hackett E M and National symposium on fracture mechanics. Fracture mechanics: twenty-first symposium. Philadelphia: ASTM. 1990.
