APA-ийн эшлэл(7 дахь хэвлэлт)

(1990). OECD economic surveys: Belgium-Luxembourg. Organisation for Economic Co-Operation and Development.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

OECD Economic Surveys: Belgium-Luxembourg. Paris, France: Organisation for Economic Co-Operation and Development, 1990.

MLA -ийн эшлэл (9 дэх хэвлэлт)

OECD Economic Surveys: Belgium-Luxembourg. Organisation for Economic Co-Operation and Development, 1990.