Baker, Ross K.
Friend and Foe In the U.S. Senate
Free Press, 1980
 Buku Teks
Gorsky, N
The sea friend and foe / N. Gorsky
Foreign Languages Publishing House, 1961
 Buku Teks
Barton, Hugh
Shaping neighbourhoods: a guide foe health, sustainability and vitality
Spon Press, 2003
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Buzgan, Turan
An old foe still with us: troubling issues on brucellosis
Islamic World Academic of Sciences, 2017
 Artikel Jurnal
Environmental law and sustainability after Rio
Jamie Benidickson ... [et al.]., editor
Edward Elgar, 2011
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