Aliases && Columns Name W/ Spaces

Formatting question. The query below is failing on the columns with spaces in the name. I've tried brackets and single quotes with no luck. How should this be formatted?

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SELECT x.trkuniq, s.mstuniq, t.meetuniq,
c.coursec AS Course_Code,
c.descript AS Course_Name,
[q.cactus #] AS Cactus_#
s.sectionn AS Section,
RTRIM(f.lastname) + ', ' + RTRIM(f.firstname) AS Teacher, f.funiq,
t.termc AS Term_Code, zd.cycldayc AS Day,
zp.periodc AS Period, zp.periodn,
p.schoolc AS School
FROM mstmeet t INNER JOIN
mstsched s ON t.mstuniq = s.mstuniq INNER JOIN
trkcrs x ON s.trkcrsuniq = x.trkcrsuniq INNER JOIN
course c ON x.crsuniq = c.crsuniq INNER JOIN
track p ON p.trkuniq = x.trkuniq INNER JOIN
facdemo f ON s.funiq = f.funiq INNER JOIN
courses q ON c.coursec = [q.course number] INNER JOIN
trkper zp ON t.periodn = zp.periodn AND
x.trkuniq = zp.trkuniq INNER JOIN
trkcycle zd ON t.cycldayn = zd.cycldayn AND
x.trkuniq = zd.trkuniq