APA
Dobner T., Gerrold D., Bradfield S., Goldin S., Tiptree J. J., Yep L., Bryant E., Kelley L. P., Sargent P., Bunch D. R., Deeley R., Weissman B., Laurance A., Margroff R. E., Offutt A. J. & Wyal P. (1977). Protostar. Milano: Longanesi & C.
Chicago
Dobner Tullio, Gerrold David, Bradfield Scott, Goldin Stephen, Tiptree James Jr, Yep Larry, Bryant Edward, Kelley Leo P, Sargent Pamela, Bunch David R, Deeley Roger, Weissman Berry, Laurance Alice, Margroff Robert E, Offutt Andrew J and Wyal P.G. 1977. Protostar. Milano: Longanesi & C.
Harvard
Dobner T., Gerrold D., Bradfield S., Goldin S., Tiptree J. J., Yep L., Bryant E., Kelley L. P., Sargent P., Bunch D. R., Deeley R., Weissman B., Laurance A., Margroff R. E., Offutt A. J. and Wyal P. (1977). Protostar. Milano: Longanesi & C.
MLA
Dobner Tullio, Gerrold David, Bradfield Scott, Goldin Stephen, Tiptree James Jr, Yep Larry, Bryant Edward, Kelley Leo P, Sargent Pamela, Bunch David R, Deeley Roger, Weissman Berry, Laurance Alice, Margroff Robert E, Offutt Andrew J and Wyal P.G. Protostar. Milano: Longanesi & C. 1977.