Gaya APA
Maceachern, S. (2004).
Student Encyclopedia Volume 9 Inventors and Inventions - Longitude (9).
cambridge, UK:
GROLIER DANBURY,CONNECTICUT.
Gaya MLA
Maceachern, Sally.
"Student Encyclopedia Volume 9 Inventors and Inventions - Longitude".
9
cambridge, UK:
GROLIER DANBURY,CONNECTICUT,
2004.
Text.