HEIMLER, C. H., DANIEL, L., & LOCKARD, J. D. (1984). Focus on life science. Charles E. Merrill.
Lua i Stíl Chicago (17ú heag.)HEIMLER, Charles H., Lucy DANIEL, agus J. David LOCKARD. Focus on Life Science. Columbus: Charles E. Merrill, 1984.
Lua MLA (9ú heag.)HEIMLER, Charles H., et al. Focus on Life Science. Charles E. Merrill, 1984.
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