Gaya APA

TWIST, C. (1998). MACMILLAN REVISED ENCYCLOPEDIA OF SCIENCE LIFE ON EARTH 4 . NEW YORK: MACMILLAN REFERENCE.

Gaya MLA

TWIST, CLINT. "MACMILLAN REVISED ENCYCLOPEDIA OF SCIENCE LIFE ON EARTH 4". NEW YORK: MACMILLAN REFERENCE, 1998. Text.