Asimov, I., & Asimov, J. (1994). Fronteras II. Ediciones B.
Chicago Style (17th ed.) CitationAsimov, Isaac, and Janet Asimov. Fronteras II. Barcelona: Ediciones B, 1994.
MLA (9th ed.) CitationAsimov, Isaac, and Janet Asimov. Fronteras II. Ediciones B, 1994.
Warning: These citations may not always be 100% accurate.