National Geographic Society (authors)., & Alton Biggs ... [et al.]. (2000). Science voyages: Exploring the life, earth, and physical sciences. New York, NY: Glencoe/McGraw-Hill.
Παραπομπή Chicago StyleNational Geographic Society (authors)., και Alton Biggs ... [et al.]. Science Voyages: Exploring the Life, Earth, and Physical Sciences. New York, NY: Glencoe/McGraw-Hill, 2000.
Παραπομπή MLANational Geographic Society (authors)., και Alton Biggs ... [et al.]. Science Voyages: Exploring the Life, Earth, and Physical Sciences. New York, NY: Glencoe/McGraw-Hill, 2000.
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