Perl autosplit inside quotes

I tried to print my apache2 access log dates with the following one liner. Within single quotes it shows the value but within double quotes it shows as Array object. My command is as follows

sudo perl -ane 'print $F[3] . "\n" ' /var/log/apache2/access.log | head -n 10  

Output

[21/Jul/2014:09:16:05

[21/Jul/2014:09:16:05

[21/Jul/2014:11:32:55

[21/Jul/2014:11:32:55

[21/Jul/2014:11:32:59

[21/Jul/2014:11:33:02

[21/Jul/2014:11:33:02

[21/Jul/2014:11:33:10

[21/Jul/2014:11:33:14

[21/Jul/2014:11:33:14



sudo perl -ane "print $F[3] . \"\n\" " /var/log/apache2/access.log | head -n 10

output

ARRAY(0x195fca8)

ARRAY(0x1960128)

ARRAY(0x195fca8)

ARRAY(0x195fd38)

ARRAY(0x1960128)

ARRAY(0x195fca8)

ARRAY(0x195fd38)

ARRAY(0x1960128)

ARRAY(0x195fca8)

ARRAY(0x195fd38)

When I try to dereference the array it shows one.

sudo perl -ane "print @{$F[3]} . \"\n\" " /var/log/apache2/access.log | head -n 10

output

1

1

1

1

1

1

1

1

1

1

I am using ubuntu 12.04 64 bit with guake terminal.