McDonald, Mlcolm
Marketing plans : how to prepare them, how to use them
John Wiley & Sons, 2011
 Buku Teks
Elkin, A. P.
The Australian Aborigines : how to understand them
Angus and Robertson, 1966
 Buku Teks
Elkin, A. P.
The Australian aborigines : how to understand them
Angus and Robertson, 1956
 Buku Teks
Griffiths, Martin
Planetary nebulae and how to observe them
Springer, 2012
 eBooks
Schmude, Richard
Artificial satellites and how to observe them
[Springer, ], 2012
 eBooks