Gaya APA
MacEachern, S. (2004).
Grolier Student Encyclopedia Vol. 9 : Inventors And Inventions - Longitude .
Danbury:
Grolier.
Gaya MLA
MacEachern, Saily.
"Grolier Student Encyclopedia Vol. 9 : Inventors And Inventions - Longitude".
Danbury:
Grolier,
2004.
Text / Book.